Blindstitch-piping machine



Aug. 14, 1923. 11,464,997

H. C. MOULTON BLINDSTITCH PIPING MACHINE Filed April 14, 1922 2 Sheets-Sheet 1 lnvenTor. Hurle QMoulTon by MMTM A'fiys.

Aug. 14, 1923. 1,464,997

H. c. MOULTON .-BLINDSTITCH RIFING MACHINE Filed April 14, 1922 2 Sheets-Sheet 2 Fi .7] Fig.8.

Patented v V T tus-rise?"sea i m ereiea Hanna? olvrourfrlonp or vinnroan, raasslicrrusnrrs, ASSIGNORQ BY MESNZE assiemr nu'rs, mo LAWaEnon. 1a. STEIN, or onroeeo, ILLINOIS.

' lsiglii'nsrrrorr rrrrne HINE;

- V TouZZ whom it may concern lvlassachusetts, 'liave' inYe-nted an Improve ment in Blindstitcli-P p1ng Machines, ot which the following description, in connection with tlie aeeompanying drawing, "is aspecification, like characters on the drawing representing like parts. I

.ulh-is invention'relates to improvements in blind stitch sewing machines for sewing the ed ge'portion of 1a" superimposed layer upon a base layer of material in which the stitches "be laid'in the superimposed layer at V a distance Well back from the edge of said layer. V

More particula'rly the' invention relates to improvements in sewing maohinesadapted to blind stitch the piped ed-ge'o'zi a superim-' posed layer upon base'layer of material and inwv hich the stitches in the su; erinr posed layer or piping will be wholly-con ce-aled. a

In the usual employment of piping in the e of gari'nents; the piping is;

manuta 7 usually feaused .to embrace and enclose the edge of a shperimpo sedlayer and is secured to the same by through and tl'iroughlstitching The edge portion of this superimposed layer is then sewed/upon the base layer'or layers by lines he stitching. in the production of such lines of stitching the v needle is either passed downwardly through V the superimposed layenad acent the edge ot the piping, intoithe base layer without pass imposed layerand extends along the edge of the piping. Insewing the piped edge of a superimposed layer upon abase layer of material it is found dlfficult to cause the piping; at all points and anydivergence 7 in this line of stitching from the edge ot the piping causesvan iiisigl tly appearance.

Furthermore, the appearance (if such an ad ditionallline' :of stitching is: n'otjde'sira'hle.

In the presentiinventio'n means are provided to stitchthepiped edge to the baselayerby ngin wvliiehithe loops Which rows of stitchi G;lvIeuL-rcn- 'a citizen of the 'Unitedgtaftes, and sident o f Medtorch county pfMIddlesex, State 0t 'pr/ovide means for the line of stitching to follow the edge of 5 14, 1922. Serial u 552,549.

arelaid in the superimposed layer are enin the base layer, so that the piped edge tirely concealed as preferably are also'those 7 presents a more desirable appearance than t has heretofore been aroduced b machine WOljli or is usually produced by hand Work.

A further object of the invention "is to provide a blind stitch sewing machine for stitching the edge portionot' a superim posed layer on a base layer of material with means which will turn or roll up the edge of the superimposed layer as it is gruded alongside the path of the needle and to provide 'means for bending, or other Wise presenting, the under-face ofthe layer in the path of the needle so that the needle will enter and emerge from the under surface of the superimposed "layer at a considerable distance from its edge. This is accomplished in the present invention by providing a perferabl-y combined guide and bender in which the guidejembraces the edge portion of the superimposed layer adjacent the stitching point and the bender acts to' thrust the under face of the layer into the path of the needle. 7 V

A further object of the invention is to provide a guideand bender forthus manipulating the edge portion of the superimposed layer which will release said edge portion from its-deflected or bent position during the actionof-the feeding mechanism so that theedge portion of the superimposed layer may be straightened and more easily advanced, This is accomplished by providing an upper guide and bender Which is moved into position to present the edge portion of the superimposed layer in the path" of the needle by the 'clampingmovement of the Work support and presser foot and is automatically released from such position by the separation of the Work support and presser foot during the feeding opera- VA further object of the invention is to adjusting the guiding and bending means in order to providetor the proper manipulation of goods of different character and thickness Q A further object of the invention is to provide anovel type of presser foot having mounted thereon a movable device or devices operable by the relative movement of the Work support and'presser foot to guide properly the under face "c t a piped or further object of the invention is to provide a novel form of work support which W111 more etlectivelypermit the manipulation and presentation of the base and superimposed layers to the stitch forming media nism. y

' A further OlDJQCt ot' the invention is to improve the r lation between the feeding niech anisnn the presser foot and work support which. Iwill enable the base and superimposed layers to be more uniformly advanced by the teedinpy mechanism.

another object of the invention. is to pro-' vide a piping machine construction in which the body of the garment to be piped may be.

supported upon the sewing; machine table outside of the arm, thus enabling the goods to be manipulated more freely than in usual machines in which the bod-y of the goods is necessarilyplaced beneath the arm. This is accomplished by placing the mechanism which presents the piped edge to the needle upon the inner side. that is, toward the arm of the machine, instead of the outer side as in usual construct-ions, so that the folded over edge which isipiped extends outwardly, that is, awayfrom the arm.

Other objects and features of the invention will more fully appear from the following description and the annexed drawings and will be pointed out particularly in the accompanying claims.

1 V The preferred embodiment of the invention is disclosed herein as applied to the type of blind stitch sewing machine for sewing a superimposed layer upon a base layer of material vwhich is illustrated and de* :scribed in my co-pendin a' application No.

im'ovable prcsser toot and work support which are normally held in clamping relation, but are separated to release the work by the action of a feeding mechanism. In that machine a suitable bender is reeipro cably mounted in the work support and is intermittently actuated to present the base layer in thepath of the needle.

Only a ,sufiicient portion of the general type of machine is illustrated in the accompanying drawings to show the manner in which the present invention isa-pplied thereln the drawings: I r Fig. 1 1s a side elevation of aportion of the stitch forming mechanism and feeding mechanism of said machine and illustrates particularly the form and relation of the presser foot and work support embodying' the present invention; 7

F 2 is a detail front elevation of the presser foot; l

. Fig. 3 is a plan view of the presser toot illustrated in Fig. 2;

'Fig. i is a Vertical sectional view on line 4 4, Fig. 3 viewed from the right toward the left;

Fig. 5 is a vertical sectional View on line 55, Fig. 3, viewed from the left toward the right;

Fig. 6 is an under plan View of the presser foot and feeding mechanism in assembled position, the adjustable pivotal mounting for the guide and bender being'shown in section 7 isv a detail rear elevation of the;

presser foot and work support;

F in. 8 is a plan ,view of a preferred form of work support;

Fig. 9 is a front elevation of the work support shown in Fig. 8;

Fig. 10 is a perspective View of a combined guide and bender for the edge of the superimposed layer; 7

Fig. 11 is a detail transverse sectional View through'the combined guide and bender when in stitching position; also showing in.

the normal position of the edge of the superimposed layer; and, r

Fig. 12 1s a detail View of the pivotally mounted guide and bender showlng in full lines the guide and bender in lowered or.

feeding position, the base and superimposed layers being shown in section, and also showing in dotted lines the combined gulde;

and bender in stitchin position.

The general structure ofthe sewing machine preferably. is 01": the type above briefly.

described and illustrated in my corpendinp' application No. 332,025 above identified of which the needle bar supporting member 1 carries a needle bar 2 having a curved 'OSCll'. lating' needle 3 which cooperates with complemental stitch forming mechanism in the form of a hookl carried by the usualv hook and normally sustained in clamping relation to the work support by a helical spring 10 A bender 11 mounted and operating in the horseshoe shaped feed bar 1 2, (see Fig.6)

'15 Which is eating-feeding movement throughja lever pivotall .-con1iected to said feed ibar 1-2, and the feed 'dogslare glven aver;

:ftical oscillating ,movemeno through an arm l aforesaid.

l6- rigidly. securedfto tlie 'rfear 'endf-ot the feed barlQwhieh is operated by sulta-b le' as disclosed ln the app-lrcation' mechanism [In the operation o't'tlie machine the Work is norn'iallyclamped by the work support against the presser foot. After a stitch has been formed in the base or superimposed la-yer the-feed bar. is oscillated do i n'Ward-ly to cause the feed dogs to depress the Work are support out of clamping rela v n to the presser foot. The .t'eed dog is't-hen given a longitudinal rearward moi einentwhich advances the, Work a distance of one stitch. ithe feedibar is then oscillated in the other direction bringing the Work support again into clamping rela-tion with the ipresser foot and is then advanced into position to again grasp and feed the WOI'I for another stitch.

Inthe machine disclosed in my prior application rigid guiding n'ieansV-are provided forpresenting .t-he edge of the superimposed layer in the pathof the needle upon certain of its oscillations, While a lower bender is actuated to present the base layer "in the path ot t=l1e needle during certain other, usually alternate, oscillations of EiI-l'lG needle.

The machine disclosed said prior a-ppli cation is more particularly adapted for intu-rned edge of a superimposed felling-th layerupon *a-base layer of ma'ter g present invention While capable of perftorming a similar"operation is more particularly adapted for use in stitching the piped edge of a superimposed layer upon'a hase'la-yer material, or forstitchingdown the edge portion ot a superimposed layer of heavy material upon a base layer of material.

In the manipulation of. piped edges and the edges of heavy material, difficulty has been encountered in providingmeans -':t'or

' properlypresenting the under face of't'h'e piped edge inthepath-oi the needle and for permitting a sufficiently treefeeding move ment of the piped edge, andffurtherditlicirlcy has been encountered in providing adequate means to enableseams to pass by'the ;-'stitch forniing ineans and guiding means.

The present iinientionicon'teinpla s the provis on of a' no vel guiding and bender inec'h'r TiSInfWhiCliQWill roll up the "piped edge of the superimposed layer and present the underfface of said layer in the path of the needle due in such superimposed layer and which will operate alter the stitch is formed to release the turned-up edge ortion from its distorted position during the feeding movement of the world i a More specifically-the inventionconsists in providing a blind stitchsewing machine havmgasrlgld presser foot and acooperat ing yieldable Wo-r k suppo t'i-to clamp the "Work there'between and which is operated bythefeediiig mechanism-with a movable eombined guide and-bender which engages the edge portion of the superimposed layer and isoperable by the relative movement of the Work support and presser foot to clampthe formation of the stitch ing 'position to bend the under face of'the turned-up edge portion ot' the superimposed layer into the path of the needle during the formation of the stitch in the superimposed layer and to release the turned-up portion from its distorted posi tion during the feeding operatioi-i. In order to accomplish this function a special form of presser foot is provided which, as illustrated herein, comprises a hotly 17 having upwardly extending ears 1 8 and 19 by wvhich it is secured to the hook bracket, and

onel 21 extending"upwardly from its'u-nder face forming a guide-way for the feed dog J 2).

Ar shoe22, extending rearivardly from the bottom of the presser foot, engages the outer side of the feed dog '1 and serves as a guide for the {feed dog and also acts in conjunction with the under face '28 of the heel of the presser foot and the Wall 24 of the guide-Way 21 to strip the goods from the )feed dogs 13 and- 14 when they are raised before being advanced to Work engaging position. f The usual needle plate 25 which is se cured "to the under side of the presser foot, extends laterally across the line of stitching and has a curved upper surface 26 "corresponding *to thearc of reciprocation of the needle-extending to the throat '27. "The heel portion o f the -presser foot has a'curved surface 28 Whichin efi'ect' forms a continua- Work and thereb to prevent its deflection.

"The edge of the needle plate 25 is provided with an upwardly extending flange which serves as a guide for the side of the needle in the "stroke in which it penetrates the superimposed layer as 1S usual -l11 bllIlCl;

stitch sewing machines of this type.

A guiding member'29,- which d sirably .is pivotally secured to the front endof the toe 20 by a screwalO, is provided with an upwardly extending, preferably curved, guiding flange to turn up and-roll up the piped edge of the superimposed layer.

as it approaches the stitching point. The turned up portion is thereafter engaged by a combined guide and bender which on crates in a manner hereinafter described to bend the under face of said turned-up ec ge portion at a distance from the edge thereof into the path of the needle.

The combined guide and bender which is illustrated in detail in Figs. 5, 10, 11 and 12, comprises a movable member having a free end or shoe 32 which rests upon the superimposed layer and an arm which is pivotally and adjustably mounted upon a stud 34; seated in the ear 18 of the presser foot. By reason of this construction" the pivotally mounted movable member will be raised by the work support when the latter.

is released by the feeding mechanism and co-operates with the presser foot to clamp the work during the formation of the stitch and said movable member or shoe will descend by gravity when the work support is depressed by the action of the feed dog preliminary to the action of said dog to feed the work. The upward movement of the movalle member or shoe 32 is limited by a plate 85 which is secured to the presser foot and extends over the rear portion of said movable member.

The movable member or shoe extents forwardly beyond the throat of thepresser foot and is provided with a curved face which lies at an angle to the direction of the line of stitching and approaches closely to the path of the needle adjacent thestitching point. The lower portion of the mov able member or shoe 32 has a relatively thin projection or bender 36, adjacent the stitching point, which is adapted to engage the. upper face of the superimposed layer atadistance'from its edge and to force the lower face of the turned-up portion of the superimposed layer into the path of the needle when said member is held its noring point.

The movable member or shoe 32'is pro- VldGCl'Wltll :1 preferably adJustable guide wlnchoverhes and embraces he edge of the.

superimposed layer and serves to limit the width towhich the edge portion thereof is turned up; 'Apreferred form of edge guide comprises a plate or finger 37 which is ad guide it may be properly set to manipulate;

the plain'edge or the piped .edge of the superimposed layer of any desirable material so that the line of stitching in said superimposed layer will be laid at apredetel-mined distance from cage. whereby the line of stitching when completed will be entirely concealed.

It will be obvious that when the combined guide and bender above described 1s 1n normal position in whichthe stitch isfbeing made in the superimposed layer the turnedup edge will be distorted at the stitching point so that feeding of the goods will be difficult, particularly where a relatively stiff piped edge is being sewed to'the base layer. 7 By reason, however, of its pivotal mounting the combined guide and bender will drop down and swing away from nor mal position when the work support is depressed by the feeding mechanism preparatory to the feeding movement. When the bender is swung away from its normal po sition the distorted portion of the superimposed layer is permitted to straighten and to bejadvanced easily during the feeding movement.

In order to permit the bender'and guide to operate properly upon goods of difierent thicknesses means are provided for laterally adjusting the combined bender and guide. Any suitable means'may be provided for accomplishing this purpose. As illustrated herein the arm 33 of the movable member 32, which is pivoted upon the stud Set, is provided with a relatively large circular aperture surrounding said stud and an eccentric sleeve 39 fitting said aperture is pivotally mounted upon the studS. The sleeve 39 preferably is provided with an enlarged toothed portion or head 40 which may be conveniently grasped to adjust the eccentric sleeve, and a spring pawl ll engages the teeth of the head 40 to retain the sleeve in adjusted position.

Obviously the rotary adjustment of the sleeve will position the member 32 toward and from the path of the needle so that a. proper relation betwen the bender and needle path may be obtained for goods of different thicknesses; V

Desirably the forward heel portion of the presser foot is cut away to provide a relatively large clearance space 42 beyond the stitching point, this cut-away portion being during the feeding operation and a movable work support and presser foot, means acting to cause said work support and presser foot to clamp the work therebetween, feeding mechanism operable to feed'the work and to cause said work support and presser foot to release the work during the feeding operation and a movable member engaging the edge portion of the superimposedlayer operable by the relative movement ofthe work support and presser foot to clamping position to present the under face of the edge portion of said superimposed layer the path of the needle during the formation of the stitch in said layer.

2. In a blind stitch sewing machine for sewing thejedge portion of a superimposed layer upon a base layer of material; comprising a needle and complemental stitch formmg mechanism, a relatively movable work support and presser foot 'ineans acting to cause said work support and presser foot to clamp the work t-herebetween, feeding mechanism operable to feed the work and to cause said work support and presser foot to release the work during the feeding operation and a movable member engaging the edge portion of the superimposed layer operable by the relative movement of the work support and presser foot to clamping position to present the under face, of the edge portion of said superimposed layer in the path of the needle during member pivotally mounted upon the presser foot having its free end restlng upon and engaging the edge portion of the superimp e y r and operable by, the relative movement of the work support and presser foot to clamping position to present the under face of the edge portion of the superimposed layer in the path of the needle during the formation of the stitch in said layer, {L In a blind stitch sewing machine for sewing the edge portlon of a superimposed *layer upon a base layer of material, coinprlsing a needle and complemental stitch torming mechanism, a relatively movable work support and presser foot, means acting normally to cause said work support and presser foot'to clamp the worktherebetweeiu' feeding mechanism operable to feed the work and to cause the work support and presser foot to release the work during the feeding operation and a movable member pivotally mounted upon a rotarilyladjust able eccentric carried by said presser foot having its free end resting upon the edge portion of the superimposedlayer and op-.

erable by the relative movement ofthe work support and' presser foot to clamping position to present the under face of theiedge portion of said superimposed layer in'the path of the needle during the'formation of the stitchinsaid layer.

5. In a blind titch sewing machine for sewing the'edge portion of' a superimposed layer upon .a'base layer of'material, com

prising a curved oscillating'and laterally vibratin needle and com )lemental stitch a b 7 n I formin mechanlsm a relativel movable work support and pressenfoot acting nor really to clamp the worktherebetweem feed ing' mechanism operablefto feed the work and to cause the work support and presse-r foot to release the work duringsthe feedsuperimposed layer acting to roll-up said ledge and provided with a bender por tion resting upon said superimposed layer and at it end engaging the rolled up edge 7 portion and operable bythe relative move-' ing operation and a movable member'having a guide embracing the edge'of ethementsof'the work support and presser foot to presentthe under surface of the edge portion of said superimposed layer into the path of the needle'durin'g the formation of" the stitch in said layer and to permit said edge portion to straighten during the 'feed-* 7 ing movement. V

6. In a blind stitch sewing machine for sewing the edge portion Ora superimposed layer upon a base layer of materahcomp'rising a curved oscillating and laterally vibrat ing needle and complemental stitch form ing mechanismya' relativelymovable work support and presser' foot acting normally to clamp thework therebetw'een,"feeding mechanism operable to feed the work and to cause the work supportand presser foot torelease the'w'ork during the feeding op eration .and amovable .member having a guide embracing the edge of the superimposed layer acting to roll up said edge and provided with a bender'portion.resting upon said superimposed layer' and at-its end 'engaging the rolled up edge portion and operable by the relative movements of the work support and presser'foot to present the under I surface of. theedge portion of said superimposed'layer intothe path ofthe needle during the formationlof the stitch in said layer andto permit said'edge portion to straighten during the feeding movement and means for adjusting said movable member toward and away from the line ofstitching.

7.111. a blind stitch sewing machine for sewing the edge portion of a superimposed layer upon a base layer of material, comprising a head carrying a presser foot, a

curved oscillating needle and com'plemental titch forming mechanism a yieldab-lework. supportcooperat ng wlth said presser foot 'normally to iclamp the .worl-r therebetween and feeding mechanisnLoperable to'l'eed the work andto move the work 'supportout of work clamping relation to said presser {portion operable: by the workfclamping "movement. ot the work": support to bend ,7 the under face of said edge portion'of the supernnposed layer into the patho'i the needle at the-stitching point andjuponthe releasing, movement of said worn 'to permit the edge portion of the supermn "mg movement flmitted. I 1

support posed layer to straighten whereby free teedof said edge port on is per- 8. In a" blind: stitch sewing machine for sewing the edge portion of a superimposed layer upon a base layer of material, comprisinga head carrying a presser foot, a curved oscillating needle and complement-a1 stitch forming mechanism, a yield-able work support 'co-operating with said presser foot normallyxto clamp thework therebetween and feeding mechanism operable to feed thework and to move the work support out or" work clamping relation to said presser toot during the feeding movement, a member pivotally mounted on said press-er toot having its free end rest-ing upon the superimposed layer and provided with a guide embracing the edge portion of said layer and acting to roll up said edge portion, and a bender portion engaging the rolled up edge portion operable byv the work clamping movement of the work support to bend the under faceot said; edge portion f the super-V imposed layer into the path of the needle at the stitching point and upon the releasing movement of said work support to permit the edge portion of the superimposed layer to straighten whereby tree feeding m0"G-.

' ment of said edge portion is permitted, said layer.

pivotally mounted member being provided with clearance recess at the rear of the stitching point to permit the free passage of the straightened edge of said superimposed 9. In; a blind. stitch sewing machine. for sewing the edgeportion of a superimposed layer npon'a baselayer of material, comprising headicarrying a presser foot, a curved oscillating needle and complemental stitch forming mechanism, a. yieldable work said superimposed layer.

support co-operating with said presser foot normally to clamp the work therebetween and teedingmechanism operable to feed the work and to move the work support out of work clamping relation to said presser toot during the feeding movement, a member pivotally mounted on said presser foot have ing its free end resting upon the superimposed layer and provided with aguide embracing the edge portion of said layer. and aotingto roll up said edge portion and a benderportion engaging the' rollcd up edge portion operable by. the work clamping movement 0;? the work support to bend the under face ofsaid edge portion of the super imposed layer into the path of the needle at the stitching point and upon the releasing movement of said work support to permit the edge portion of the superimposed layer to "straightenwhereby free feeding movement of said edge portion is permitted, said .pivotally mounted member and said presser foot being providedwith 'clearance recesses at the rear of the stitch ng point to permit the tree passage of the straightened edge of 10. In a blind stitch sewing machine for sewing the edge portion of a superim posed layer upon a base layer of material,

comprising a yieldable work support, a curved oscillating needle and complemental stitch forming mechanism located'and operating above said work support, a rigid presser foot located above said. work support in cooperative relation thereto having atoe provided with aguide for turning up the edge of the superimposed layer and a heel diverging away from the line of stitching beyond the stitching point to provide a clearance recess for the work, a member pivotally mounted on said presser foot having a guide embracing the edge of the superimposed layer and a bender engaging said layer, adjacent the stitching point, ac t ing to force the under face of said superimposed layer into the path of the needie and feeding mechanism operable vto cause' the work support, to release the work duringthe feeding operation.

11. Ina blind stitch sewing machine for forming mechanism located and operating above said work support, rigid presser foot, located above'said work supportv in cooperative relation thereto, having a toe provided with a guide for turning up the edge o't' said superimposedlayer and a heel por tion diverging away from the line of stitchbeyond the'stitching point to provide a clearance recess. for the work, a member wivotally mounted-on sald presser foot hava guide embracing the edge f the super-- and complemental stitch forming mechanism a relatively movable work support and presser foot, means acting to cause the work support and presser foot to clamp the v \VOIk therehetween, feeding mechanism hav-- ing work engaging inembers'engaging re spectively the base layer and the superimposed'layer upon opposite sides of the line of stitching at a distance from the, edge of the superimposed layer and acting during the feeding movement to cause the work support 'and'presser'foot to release the work, a member pivotally mounted on said presser foot having its free end resting upon the superimposed layer and guiding moans embracing the edge of said layer and operable by the relative movement of the work sup port and presser foot to clamping position to roll up the edge portion of said superimposed layer and to present the under surface thereof in the path of the needle.

13. In a blind stitch sewing machine for sewing the piped edge of a superimposed layer upon a base layer of material, comprisinga curved oscillating needle and C0111- plemental stitch forming mechanism. a reciprocable work support and feeding mechanism, a movable guide and bender for the piped edge of the superimposed layer operable by the reciprocation of said work support alternately to bend the under face of the piped edge into the pathof the needle and to permit thepiped edge tostraighten during the feeding niovementf 14:. A presser foot for blind stitch sew- .ing machines for sewing the edgeportion of a superimposed layer upon a base layer of material, comprising a member freely pivoted upon said presser foot to swing below the plane of the work engaging esurface of the presser foot and provided with a guide to embrace the edge of the superimposed layer and witha bender portion underlying said guide.

' 15. A'presser foot for blind stitch sewing machines for sewingthe edge portion of a superimposed layer upon a base layer of material, comprising a member freely pivoted upon said presser foot to swing below the plane of the work engaging surface of the presser foot and provided with guide to embrace the edge of the superimposed layer and witha bender portion underlying said gulde and means for adjusting said guide.

16. A presser foot for blind stitch sewing machines for sewing the edge portion of a superimposed layer upon base layer of material, comprising a member freely p ivoted upon said presserfoot to swing below the plane of the work engaging s rface of the presser foot and provided with a guide to embrace the edge of the superimposed layer and with; a bender portion underlying said guide, the heel portion of said presser foot having a recess at the rear of the stitching point to provide a clearance for the edge I portion of the superimposed layer. 7

1'1. iii presser foot for bhnd stitch sewing machines for sewing the edge'portion of a superimposed layer upon a base layer of' member freely material, comprising a pi votedupon said presser foot to swing be low the plane of the work engaging surface of therpresser foot and-provided with a guide to embrace tl e edge of the superimposed layer and with a bender portion underlying said guide,"said member and the heel portion of said presser foot being pro- 7 needle plate having a throat engaging said base layer and guiding means engaging the superimposed layer ,a work support co-operating with said presser foot having aclamping face of shorter lengthco-operating with the toe portion ofthe presser foot and its needle plate than that which co-operates with the guiding means for the superimposed layer, the surface of the work support which co-operates with the guiding means for the superimposed layer lying in a lower plane than that which co-operates with the toe portion of the presser foot and its'needle plate, whereby a substantially, uniform clamping of the base and superimposed layers is produced and the shoulder formed by the adjacent edges of the clampingsurfaces of the work support aids in guiding the edge of the superimposed'layer. u 19. In a blind stitch sewing machine ior sewing the edge'portionfot' a superimposed layer upon a base layer of material comprising stitch forming mechanism, feeding mechanism and a presser foot havin a toe portion' provided with a laterally extending needle'plate having a throat engaging said base layer and guiding means engaging the superimposed layer; a work support'co-operatlng with said presser; foot having a clamping face of shorter length co-operating with the toe portion of the presser foot and its needle plate than that which co-operates with the guiding means for the superimposed layer, and inclined faces leading to the work clampingface of the work support of which the inclined face leading to the ing stitch forming mechanism, feeding mechanism and a presser foot having a toe portion provided with a laterally extending needle plate having a throat engaging said base layer and guiding means engaging the superimposed layer; a work support cooperating with said presser foot having a bender aperture opposite the throat in said needle plate and having a work clampin face co-operating with said presser foot an needle plate and also having a work clamping face located in a lower plane co-operating with said guiding means for the superimposed layer, inclined work supporting surfaces leading to said clamping faces including a gradually inclined surface in advance of the work clamping portion which c0 operates with the presser foot, a more steeply inclined surface located in advance of the bender aperture and a still more abruptly inclined surface leading to the work c1amp ing face which co-operates with the guide for the superimposed layer.

In testimony whereof, I have signed my name to this specification.

HARLEY C. MOULTON. 

